Properties of the Number 66406

Sixty-Six Thousand Four Hundred Six

Basics

Value: 66405 → 66406 → 66407

Parity: even

Prime: No

Previous Prime: 66403

Next Prime: 66413

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 33203

Divisors: 1, 2, 33203, 66406

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000001101100110

Octal: 201546

Duodecimal: 3251A

Hexadecimal: 10366

Square: 4409756836

Square Root: 257.69361652939716

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Dispersion of A016861, (5k+1), by antidiagonals. A191703

Expansion of ∏_k>=1 (1 + x^k)^k*(k+1*(2·k-1)/2). A294845

G.f.: exp( ∑_n>=1 A001511(n)*2^A001511(n)*xⁿ/n ) where A001511(n) equals the 2-adic valuation of 2n. A183036

a(n) = (3ⁿ⁺¹ - 2n² + 4n + 5) / 8. A262592

Largest number whose digits, in some base, sum to n and include no zeros. A365452

a(n) = 2ⁿ*(3ⁿ-3). A66406